Valve-adjusting means for internal-combustion engines



Dec. 31, 1929. R, w, A, B EWER 1,741,677

VALVE ADJUSTING MEANS FOR INTERNAL COMBUSTION ENGINES Original Filed Feb. 24, 1927 z ja -1.

a IHI 20 1 Z2 i /5 $7? 2% v l w 2 avwewiioz Patented Dec. 31, 1929 .UNITED STATES PATENT OFFICE ROBERT W. A. BREWER, OF JENKINTOWN, PENNSYLVANIA, ASSIGNOR TO HAROLD I.

PITCAIRN. OF BRYN ATHYN, PENNSYLVANIA VALVE-ADJUSTING MEANS FOR INTERNAL-OOMBUSTION ENGINES I Application filed February 24, 1927, Serial No. 170,455. Renewed Gumbel-23, 1929.

This invention has reference primarily to such valve devices for internal combustion engines as are used, for example, in aeroplane or automobile work.

The first of the objects of this invention is the provision of a device of the character indicated which will be'simple in construction, reliable in operation, not expensive to constructand which will permit necessary adjustments with certainty and accuracy and a minimum of trouble.

In order that the invention may be better understood, I- will now proceed to describe the same in connection with the accompanying drawing showing it in preferred form, in which Fig. 1 is a vertical sectional View thru the upper portion of an internal combustion cylinder showing a valve with my improvement applied thereto.

Fig. 2 is a transverse sectional view taken at rightangles .to the plane of the view shown in Fig. 1, at a point above the valve rocking lever and associated parts, and I 1 Fi 3 is a detailed sectional view taken on the line 3-3 of Fig. 1.

Referring now more partlcularly to 1,

it will be seen that I have therein indicated at 4, the upper end of an internal combustion cylinder provided with air coo'lin ribs 5.

The valve 6 has a stem 7, provided with a collar 8, and working inside of a'bushing 9 and having seating springs 10 and 11. 1

Against the upper end of the valve stem 7 there is an actuating roller 12 carried in one of the forked ends of the rocking lever 13, the other end of which has a roller 14 constructed to contact with the upper head 15 of the vertically reciprocating member which bears upon the rod 16 which latter in turn is actuated from some cam shaft or in other well known manner.

The rocker lever 13'is supported by a pivot pin 17, the ends of which are mounted in cylindrical openings eccentrically disposed within the caps or bearings 18which in turn are rotatable within the casing 19, as plainly indicated in Fig. 3.

As a convenient means for rotating the two bearing caps 18 in unison, I provide a rod 20 best shown in Fig. 2, which passes thru apertures in the caps 18, indicated at 21, is

bent around so as to engagefithe oppositely disposed caps 18, and at the same time comes into engagement at 22 with a series ofnotches 23 formed in a rib 24 on the exterior of the casing 19 and of the adjacent portion of the cylinder structure, as indicated at 24, it being found preferable to split the chamber or eccentric to the cylindrical bearing of the latter, any rotative movement of the caps 18 produced by manipulation. of the. handle 20 will shift the position of the rocking lever 13 and change the adjustment of the rollers 12 and 14 with reference to their coacting parts casing, adjustments can be readily made Without taking the members apart, there being sufficient spring in the handle 20 to permit it'to be shifted from one notch to another along the row of notches 23.

and the handle 20 being on theoutsideof the While the handle 20 will itself aid in keeping the cap bearing pieces 18 in position, I provide as an additional safety device the set screws 27 arranged to engage slots 28 in the cap pieces 18 in such manner as will resist any tendency of the cap pieces to work out of their bearings endwise.

In making adjustments in service with my improved adjusting device, all that is necessary is to move the handle 20 along the notches 23 until the rollers 12 and 14: come in contact with their coacting parts and then to provide proper amount of clearance by simply moving the handle backward one or more notches as desired, the notches being dimensioned and arranged on the rib 2 1 in predetermined position so that exactly the desired amount of clearance will be obtained movement. This can obviously be done with:

out taking any of the mechanism apart and Without the necessityv of unscrewlng any bolts or retaining members or cap screws as is required in many adjusting devices in common use.

It is also evident that in my improved adjustingmechanism all of the actuating parts are thoroughly and eficiently. encased and protected While the adjustingdevice itself is upon the outside of the casing and readily accessible at all times not only for adjustment but also for inspection.

I claim 1. In combination a valve, avalve rocker,

a valve actuating rod, an adjustable mounting for said rocker, a casing enclosing said rocker and means outside said casing for eflecting manual adjustment of said rocker, including a member adapted to engage the casing to hold the rocker in adjusted posi-' tion said member being resilient to enable its being disengaged from the casing when adjustment is to be eiiected.

2. In combination a valve, a valve rocker, a valve actuating rod, an adjustable mounting for said rocker, a casing enclosing said rocker, means outside said casing for moving said rocker mounting, means carried by the casing engageable by said moving means to lock the mounting in its moved position, said moving means being resilient.

3. In combination a valve, a valve rocker having a fulcrum pin, a valve actuating rod, a movable eccentric mounting for the pin, a support for said eccentric mounting, a resilient rod for moving said eccentric mounting and means carried by a fixed part With which said rod is adapted to have snap engagement to hold the mounting in its moved position.

In testimony whereof I have hereunto signed my name. v

ROBERT W. A. BREWER. 

